elastix dialplan

i'm quite new to Asterisk and especially to Elastix.
However, i have the feeling that there is some problems in the /etc/asterisk/*.conf files in the elastix 1.1-2 iso that i downloaded and installed yesterday evening (2008-07-20)

For example i wasn't able to register any extension (either in SIP or IAX) till i changed sip.conf and iax.conf to add #include sip_additionals.conf and #include iax_additionnals.conf

Now i'm not able to make work the outbound routes.
i tried to include extensions_additional.conf and extensions_custom.conf but i get a lot of errors in /var/log/asterisk/full telling me that such extension was trying to be included without existing ... So it seems to be beyond my knowledge.

Is there anyway to get from somebody's working 1.1-2 iso (or 1.1-7 web) installation the /etc/asterisk/* files ?